/**
 *  Copyright (C) 2013  Piotr Szczepański
 *
 *   This program is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
package edu.pw.elka.gtsna.graph_creator;

import java.util.LinkedList;
import java.util.List;

/**
 * @author Piotr Lech Szczepański
 * @author P.Szczepanski@ii.pw.edu.pl 
 *
 */
public class SNAPCommunityReader extends GraphCommunityStructureReader{

	
	String[] data = null;
	int dataIndex = -1;
	int communityNumber = -1;
	
	/**
	 * @param fileName
	 */
	public SNAPCommunityReader(String fileName) {
		super(fileName);
		readLine();
	}


	@Override
	public List<Integer> next() {
		List<Integer> community = new LinkedList<Integer>();
		
		if (data != null && dataIndex >= data.length){
			data = newLine.split("\\s");
			dataIndex = 0;
			communityNumber++;
		}
		
		if (data == null){
			data = newLine.split("\\s");
			dataIndex = 0;
			communityNumber++;

		} 
		
		community.add((Integer.valueOf(data[dataIndex]))); 
		community.add(communityNumber);
		dataIndex++;	
		
		if (dataIndex >= data.length)
			readLine();
		
		return community;
	}

}
